在MIMO雷达中用于导向到达估计的异常强大的三元线性阵列设计策略
Andrea Quirini1, Fabiola Colone1, Pierfrancesco Lombardo1
1Department of Information Engineering, Electronics and Telecommunications DIET, Sapienza University of Rome, 00184 Rome, Italy.
Sensors (Basel, Switzerland)
|August 28, 2025
概括
本研究引入了使用非统一线性阵列 (NULA) 进行多输入多输出 (MIMO) 配置的准确目标到达方向 (DoA) 估计的强大的雷达系统的新设计. 优化的阵列可以减少估计错误,并提高实际雷达应用的可靠性.
科学领域:
- 信号处理
- 雷达系统工程
- 阵列信号处理
背景情况:
- 在多输入多输出 (MIMO) 雷达系统中,到达方向 (DoA) 的估计对于目标跟踪至关重要.
- 基于最大概率 (ML) 的DoA估计方法容易受到概率函数局部最大值引起的异常值的影响.
- 阵列配置对DoA估计的准确性和稳定性产生重大影响.
研究的目的:
- 为异常稳固的三元非均线性阵列 (NULA) 构建一个新的设计策略.
- 优化多输入多输出 (MIMO) 雷达系统的NULA位置,以提高目标到达方向 (DoA) 的估计.
- 在DoA估计中最大限度地提高估计准确度的同时,尽量减少异常值的概率.
主要方法:
- 研究了发射器和接收器定位对异常值发生和ML DoA估计准确性的影响.
- 利用DoA平均平方误差 (MSE) 的理论预测来指导阵列设计.
- 建议在子空间内对NULA元素的位置进行联合优化策略,确保低异常概率.
主要成果:
- 与单发射器NULA配置相比,实现了更高的估计准确性.
- 由于优化阵列中的侧叶减少,对异常值的增强稳定性.
- 在考虑物理限制的情况下,验证了该方法在低成本的3x3或2x3MIMO雷达中进行实际实施.
结论:
- 拟议的设计策略有效地减轻了MIMO雷达系统的DoA估计中的异常值.
- 优化的三元NULA配置提供了更高的准确性和稳定性.
- 这种方法适用于实际的成本敏感的雷达应用.
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